Carbureter.



C. P. GRIMES.

CARBURETER.

APPLICATION FILED 00T. 23, 1911.

Patented F6104, 1913.

QW Diesem Gbtomwt UNITED STATES PATENT OFFICE- oHARLEs P. GRIMEs', OEINDIANAPOLIS, INDIANA, AssIGNoR To WHEELER a SCHEE- LER, A.cOPAR'TNERsHIP ooMPOsEE O'E EEANK` H. WHEELER AND GEORGE M,... soHEBLEE,BOTH OE INDIANAPOLIS. INnIArnei.'v

cA-RBURETER.

Specification of Letters Patent.

To all whom t may concern.'

Be it known that I, CHARLES P. GRH/ms,

a citizen of the United States, residing at' Indianapolis, in the countyof Marion and State of Indiana, have invented a new and usefulCarbureter, of which the following is a specification. v

My invention relates to carbureter's, and. has for its object theproduct-ion of a proper mixture of air and gasolene vapor for varyingspeeds of internal combustionengines.v

My invention comprises a numberof novel features, which will appear fromthe description and drawing and will be particularly pointed out in theclaims.

The' single figure of the drawing 1s 'al vertical section through acarburetor embodying my invention:

The main body 10 ofthe carbureter is provided with a cent-ral verticalpassageway 11, which flares in smooth curves both upwardly anddownwardly from an intermediate contracted portion 12, where thegasolene is admitted. The upper end of the passage 11 comprises aninverted frusto conical por' Vtion 13 which communicates with a lateraldelivery port 14,' in which may be placed a throttle valve 15. Piercingthe disk of the throttle valve at its lowest point is -a hole 16, whichprevents any damming up of liquid gasolene in the outlet 14 when thethrottle valve is closed or nearly so.

A gasolene A-bowl 21 surrounds and is mounted on the lowerv end of themain body 10, being pressed upward against the flange 22 on said mainbody by a nut 23. An air inlet compartment 24, which may be providedwith an air contrl valve 25 and a drain 26, is mounted On the main body10 below the nut 23. 'Both the air inlet compartment 24 and the gasolenebowl 21 may be swung around the vertical axis of the main body 10 to anydesired position, the air inlet compartment being clamped in such aposition by a clamping screw 27. The gasolene in the bowl 21 is kept ata sub'- stantiallyconstant level by a float 28 opy erating a valve 29which controls t-he gasolene inlet 30 fed from any suitable `source of.gasolene supply. The float is conveniently an annulus. The level of thegasolene in the bowl 21 is slightly below the contracted portion 12 ofthe passageway 11. There is a communication between this contractedportion and the gasolene in the bowl, preferably by a plurality ofpassages 35 and 36 drilled or otherwise formed in the main bodyv l0. Oneof these passages as 35, but preferably not all of them, may beadjustable by a needle valve 37, which may, be held in adjusted positionby a spring pressed ball 38.

In the top of the main body 10 is mount- -ed a plug 40'provided with'adepending socket 41. vIn lthis socket is a spring 42, on which rests apiston 43 mounted on'the upper end ofla rod 44. On the lowerend of thisrod is a tapered bob`45, and fixed on the rod 44 above the bob 45 is adisk 46.

-Both the bob 45 and the disk 46 are below the lower end of the `socket41, the upper end of which may be closed, if desired, by

a cap 47. The piston 43 in itssocket' 41 forms a dash pot.v The weightof the bob 45v and the -disk46 1s such that when no air is passingthrough the carbureter they hang in the positionl shown in dotted lines,the spring 42 then being compressed toits minimum travel. In thisposition, which is assumed when the engine is at rest oroperatingat alow speed, the disk 46 is at the loweryor smaller end of the frustoconical portion 10, which is nearly closed thereby, and the largest partof thebob 45 is in the contracted portion 12 of the passage-way 11,which also 'is then nearly closed. Anyair now demanded by the engine hasto pass around the edges of the bob 45 and the disk 46; land does so,because of the small area for passage, with a considerable velocity. Onaccount of this velocity, gasolene from the bowl 21 is drawn through thepassages 35 and 36 andmix'e'd with the passing air to form a properexplosive mlxture. As the speed of the en-v gine increases and more ofthe explosive mixture is demanded the pressure above the disk 46 isdiminished so that the excess of pressure below such disk lifts the,latter and thus increases the area of assage around such diskand the bob45. Xs a result, the air passes the inner ends otthe passages 35 and 36in a thick layer, and at a velocity which, though usually numericallyhigher than before is somewhat lower in ro ortion to the volume of gasdelivered he position taken by the disk 46 and bob 45 d pends on thespeed of t-he engine and the cgnsequent demand on the carbureter, thelupper limiting position being shown in the Patented Feb. 4, 1913.Application mea october 23, 1911. serial No. 656,244.

ope-ning at` the bottom for having a vertical air passageway the upperend ot which flares upward, a gasolene bowl communicating with saidpassage-way below said daringportion, a` disk movable axially of saidflaring portion in and beyond the upper end or the latter, and a bobcarried.

by said dish and by its vertical movement varying the area for thepassage ot air' in the passageway at the point where it communicateswith the gasolene bowl, said disk being movable along said flaredportion ot" the passageway by the diderence in pressure onits two sides.

2. A carbureter comprising a member having a vertical air passage-waythe upper end of which flares upward, a gasolene bowl communicating withsaid passage-way below said flaring portion, dislr movable axially ofsaid :daring portion, and a bob carried by said disk and by its verticalmovement varying the area vtor the lpassage of air in the passage-way atthe point where it commucates with the gasolene bowl, said disk beingmovable along said flared portion of the passage-way by the diderence inpressure on its two sides, and a spring for carrying part of the weightoil the disk and bob.

3. ln a carburete'r, the combination of a member having a verticalpassage-way which is restricted at an intermediate portion of its lengthand at itsupper end-terminates in an inverted rustum, agasolene bowl,said member being rovided with pas sa es which lead :trom said gasolenebowl to said restricted portion of the passage-way, atapered bob movableaxially along said passage-way from said restricted portion upward, anda member mechanically connected to said bob and suspended so as to bemovable in and beyond the upper end of said trustum.

il. A carbureter having a vertical mixing passageway and a lateraldeliver port, in combination with a throttle valve ocated in saiddelivery port and provided with an reventing the damming up of liquidbehin it.

5. A carbureter havin a vertical mixing passage-way and a lateradelivery port, said elivery port being fed downwar 1y from the upper endof the mixing passage-way, in combination with a throttle valve locatedin insana i said delivery port and provided with an opening at thebottom for preventing the damming up ot liquid behind it.

6. ln a carbureter, the combination of a `member having a vertical airpassage-way which flares in smooth curves both upwardly and downwardlytrom an intermediate contracted portion and at its upper end has theshape o an inverted frustum of which the sides are tapered less sharplythan those of the portion between it and the contracted portion, agasolene bowl, said member being provided with passages which lead fromsaid gasolene bowl to said restricted portion of the passage-way, atapered bob movable axially along said passage-way from said restrictedportion upward, and a member mechanically connected to said bob andsuspended so' as to be movable in said lirustum I along the'aXisthereof.

7. ln a carburetor, the combination of a member having a vertical airpassage-way which ilares both upwardly and downwardly from anintermediate contracted portion and at its upper end has theshape of aninverted -frustum of which the sides are tapered yless sharpl than thoseof the portion between it an the contracted portion, a gasolene bowl,said member being providedwith passages which lead from said gasolenebowl to said restricted portion of the passage-way, atapered bob movableaxially along said passage-way from said restricted portion upward, anda member mechanically connected to said bob and suspended so as to bemovable in said lrustur'n along the axis thereof.

8. A carburetor comprisingv a member havin a vertical airpas'sage-waythe upper end o which flares upward,a gasolene bowl communicating withsaid passageway' below said flaring portion, a disk movable axially ofsaid flaring portion, a rod projecting trom the lower side of the saiddisk, and a bob carried onV the lower end of said rod and by v,itsvertical movement varying the area torthe passage of air in thepassageway at the point where it communicates with the gasolene bowl,said bob and said disk both nearly closing said passage-way when thedisk is in its lowermost position, and said disk being movable alongsaid flared portion of the passage-way by the difference in pressure onits two sides.

lin witness whereof, l, have hereunto set Amy hand and seal atIndianapolis, lndiana,

this eighteenth day of October, A. D. one thousand nine hundred andeleven.

errantes r. seines. are] Witnesses:

FRANK A. Finire, G. B. SCHLEY,

